at first I thought I had an STD. I am itchy around my Hymen and have a milky white discharge that seems constant. There is no redness but I have a burning sensation when I go to the bathroom. It burns around my Hymen and Clitorous. I noticed this three days after sex. I took the morning after pill two days before the last time I had sex with the same partner. I am also on the contraceptive pill but have not been taking it every day. Could this be an imbalance of the natural bacteria causing an infection or could it be an STD?